Window lock



R. MONROE 2,268,766

WINDOW Loox Filed July 20, 1940 I9 I Il v Vue-mint ISQ. P/cHAep'Ma/veofPatented Jan. 6, 1942 UNITED STATES PATENT crei-#Ice W'INDOW LOCK.Richard Monroe, Houston, Tex. 'Application July 20, 1943, Serial No.v346,4?:65

I (el. 292-228) 3 Claims.

This invention relates to a window lock.

An object of the invention is to provide a lock of the characterdescribed whereby a 'lower -window sash may be locked, at anydesired-elevation, against upward movement relative to the upper sash.

It is another object of the invention to provide a window lock whichwill automatically lockupon downward movement of the lower sash andwhich may be readily released from the inside -of the room only, when itis desired to elevate the lower sash.

It is a further object of the invention to provide a window lock havinga guard which will prevent access to the lock from without and thusprevent the unauthorized release of the lock and elevation of the windowsash.

With the above and other objects in View the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawing, wherein:

Figure 1 shows a fragmentary, front elevational view of the sashes of awindow shown locked in closed position. l

Figure 2 shows an enlarged, ragmentaxysectional View taken on the line2-2 of Figure l,

and

Figure 3 shows an enlarged, fragmentary, cross-sectional View taken onthe line 3-3 of Figure 2.

Referring now more particularly to the draw ing wherein like numerals ofreference designate the same parts in each of the figures, the numeral Idesignates a housing preferably formed of sheet metal and whichmay be ofany selected contour. The housing is provided with a lateral flange 2provided with openings to receive the screws 3, 3 whereby the housingmay be secured to the top of the lower window sash 4 as shown in Figures1 and 3. The housing is enclosed on all sides excepting. the side facingthe upper sash 5 which latter side is open.

The open side of the housing is tted closely against the vertical metalstrip 6 which is secured at its upper and lower ends by the screws 8a.,6a, to the inside of the frame of the sash 5 and which is preferablyslightly countersunk into said frame as shown in Figure 3. The sidemargins of the strip 6 are overturned inwardly, or toward each other,forming the flanges 1, 1. The strip 6 is formed with downwardly andinwardly pitched ratchet teeth 8, as more clearly shown in Figure 2.

The bottom ofthe housing is closedy `by the top of vthe sash 4 andVwithin it and fastened yto the top `of said sash Vby the screws 9 thereis a plate |10 vwhose side margins are upwardly turned and formed withthe `ears II. Fastened to these ears there is a `transverse rod I2.

Within the housing there is a plate-like dog I3 having the downwardlyturned marginal flanges I4 formed, at their 'inner ends with thebearings `on Asaid rod whereby the dog is pivotally mounted. This dog isextended inwardly forming a pressure plate I6. Surrounding the rod I2there is a coil spring I1 one end of which is retracted and clampedunderneath the inner end of the plate I0 and which is thereby anchoredin place. The other end of the spring is extended through an opening inthe pressure plate I6 and the spring normally acts against the dog I3 tohold its free end in position to engage with the ratchet teeth 8 so asto lock the dog with said teeth and to hold the lower sash 4 againstupward movement. The inner side of the housing I is formed with aninwardly swinging door or shutter Ia which may be opened for access tothe pressure plate I6. The pressure upon said plate will release the dogI3 from the ratchet teeth and permit the elevation of the lower sash 4which may be raised by means of the usual lift 4a.

It will thus be obvious that when it is desired to open, or elevate, thelower sash the dog I3 may be released and sired level and upon releaseof the pressure plate I6 said dog will automatically engage the corre- 1sponding ratchet tooth 8 to prevent further elevation of the lower sash.As the lower sash isr lowered the free end of the dog I3 will ride overthe teeth 8 and said sash may be lowered until it is closed and will beautomatically locked in closed position.

Within the housing l there is a guard I8 of a general rectangular shapebut whose side walls are slightly flared inwardly, At its outer sidesaid side walls are outwardly turned forming the vertical flanges I9, I9which engage behind the flanges 1, as also shown in Figure 3, thusproviding a sliding connection between the guard I8 and the strip 6. Theupper and lower ends of the guard I8 fit closely against the strip 6between its side flanges 1, as shown in Figure 2. This guard is providedto prevent access to the dog I3 from without so that the dog cannot bereleased, and the lower sash unlocked, by the insertion of an instrumentfrom the outside upwardly between the two sashes.

the sash elevated to the de.

The drawing and description are illustrative merely, the invention beinglimited only by the appended claims.

What I claim is:

1. A window lock comprising a housing adapted to be secured to a movablewindow sash, a dog pivotally mounted within the housing, yieldable meansnormally holding the free end of the dog projected from the housing intoposition to engage with a IXed ratchet to lock the sash against movementin one direction, said dog being mounted to allow movement of the sashin the other direction, an approximately rectangular guard in thehousing and having a sliding connection with the ratchet and throughwhich the dog Works, said guard being arranged to prevent access to theengaging end of the dog.

2. A device of the character described comprising a strip formed withratchet teeth and whose side margins are overturned inwardly formingiianges, a housing adjacent said strip and whose side facing-the striphas an opening, a guard within the housing around the opening and havingside walls whose margins adjacent said strip are outwardly turnedforming flanges which engage the flanges of said strip to form a slidingconnection between the guard and strip and means mounted within thehousing arranged to work through the guard and opening and to engage theratchet to lock the housing against movement in one direction and beingmounted to release the ratchet to allow movement of the housing in theother direction, said guard being provided to prevent access to saidengaging means.

3. A device for locking Window sashes comprising an elongated ratchetmember formed with ratchet teeth and having inwardly turned marginalflanges, said ratchet members being adapted to be secured to a windowsash, a housing adapted to be secured to another sash and arrangedadjacent said ratchet member, the side of the housing adjacent saidmember being provided with an opening, a guard Within, and movable with,the housing, and arranged around the opening and having side walls whosemargins adjacent said ratchet member are outwardly turned forming:flanges which engage the anges of said member to form a slidingconnection between the guard and ratchet member, yieldable meansmountedwithinvthe housing and having an operative end arranged to Work throughthe guard and opening and to engage the ratchet to lock the housingagainst movement in one direction and being mounted. to release theratchet to allow movement of the housing in the other direction, theother end of said engaging means being extended forming a pressureplate, said guard being provided to prevent access to said operative endof said engaging means.

RICHARD MONROE.

